bhnd(4): Implement property/property list API.

[landonf]

Summary

Implement a new bhnd_nvram_plist and bhnd_nvram_prop API for representing
arbitrary NVRAM key/value pairs.

This will be used to track pending changes in bhnd_nvram_store, and provide
support for exporting all or a device subpath for NVRAM (as required by
some SDIO and fullmac devices.)

[adrian]

ok!

head/sys/conf/files

SYSCTL_INT(_kern, OID_AUTO, kerneldump_gzlevel, CTLFLAG_RWTUN,
     "Kernel crash dump compression level");
 
 /*
  * Variable panicstr contains argument to first call to panic; used as flag
  * to indicate that the kernel has already called panic.
  */
 const char *panicstr __read_mostly;
 
-int __read_mostly dumping;                /* system is dumping */
-int rebooting;                                /* system is rebooting */
+int dumping __read_mostly;                /* system is dumping */
+int rebooting __read_mostly;                /* system is rebooting */
 /*
  * Used to serialize between sysctl kern.shutdown.dumpdevname and list
  * modifications via ioctl.
  */
 static struct mtx dumpconf_list_lk;
 MTX_SYSINIT(dumper_configs, &dumpconf_list_lk, "dumper config list", MTX_DEF);
 
 /* Our selected dumper(s). */

head/sys/dev/bhnd/nvram/bhnd_nvram_plist.h

SYSCTL_INT(_kern, OID_AUTO, kerneldump_gzlevel, CTLFLAG_RWTUN,
     "Kernel crash dump compression level");
 
 /*
  * Variable panicstr contains argument to first call to panic; used as flag
  * to indicate that the kernel has already called panic.
  */
 const char *panicstr __read_mostly;
 
-int __read_mostly dumping;                /* system is dumping */
-int rebooting;                                /* system is rebooting */
+int dumping __read_mostly;                /* system is dumping */
+int rebooting __read_mostly;                /* system is rebooting */
 /*
  * Used to serialize between sysctl kern.shutdown.dumpdevname and list
  * modifications via ioctl.
  */
 static struct mtx dumpconf_list_lk;
 MTX_SYSINIT(dumper_configs, &dumpconf_list_lk, "dumper config list", MTX_DEF);
 
 /* Our selected dumper(s). */

head/sys/dev/bhnd/nvram/bhnd_nvram_plist.c

SYSCTL_INT(_kern, OID_AUTO, kerneldump_gzlevel, CTLFLAG_RWTUN,
     "Kernel crash dump compression level");
 
 /*
  * Variable panicstr contains argument to first call to panic; used as flag
  * to indicate that the kernel has already called panic.
  */
 const char *panicstr __read_mostly;
 
-int __read_mostly dumping;                /* system is dumping */
-int rebooting;                                /* system is rebooting */
+int dumping __read_mostly;                /* system is dumping */
+int rebooting __read_mostly;                /* system is rebooting */
 /*
  * Used to serialize between sysctl kern.shutdown.dumpdevname and list
  * modifications via ioctl.
  */
 static struct mtx dumpconf_list_lk;
 MTX_SYSINIT(dumper_configs, &dumpconf_list_lk, "dumper config list", MTX_DEF);
 
 /* Our selected dumper(s). */

head/sys/dev/bhnd/nvram/bhnd_nvram_plistvar.h

SYSCTL_INT(_kern, OID_AUTO, kerneldump_gzlevel, CTLFLAG_RWTUN,
     "Kernel crash dump compression level");
 
 /*
  * Variable panicstr contains argument to first call to panic; used as flag
  * to indicate that the kernel has already called panic.
  */
 const char *panicstr __read_mostly;
 
-int __read_mostly dumping;                /* system is dumping */
-int rebooting;                                /* system is rebooting */
+int dumping __read_mostly;                /* system is dumping */
+int rebooting __read_mostly;                /* system is rebooting */
 /*
  * Used to serialize between sysctl kern.shutdown.dumpdevname and list
  * modifications via ioctl.
  */
 static struct mtx dumpconf_list_lk;
 MTX_SYSINIT(dumper_configs, &dumpconf_list_lk, "dumper config list", MTX_DEF);
 
 /* Our selected dumper(s). */